Python tidbits: inverting the nesting of a nested list.
More than once I came across the problem of rearranging a nested list. I had a nested list of the form
X = [['a', 'b', 'c'], ['d', 'e', 'f']]And I want
Y = [['a', 'd'], ['b', 'e'], ['c', 'f']]without having to resort to an ugly list comprehension over 3 lines. A friend told me to use
Y = zip(*X)So easy! Kind of obvious but I didn't find it on the web. So I thought I'd write it down. Enjoy!